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Accessing “Outer” Variables

Anonymous methods are interesting in that they are able to access the local variables of the method

that defines them. Formally speaking, such variables are termed 

outer variables of the anonymous

method.

■

Note

An anonymous method cannot access 

ref

or 

out

parameters of the defining method.

Assume our Main() method defined a local integer named aboutToBlowCounter. Within the

anonymous methods that handle the AboutToBlow event, we will increment this counter by 1 and

print out the tally before Main() completes:

static void Main(string[] args)

{

...

int aboutToBlowCounter = 0;